Engine monitor image for a portion of a display screen



The single FIGURE is a front view of an engine monitor image for a portion of a display screen, showing our new design.

The broken line showing of the display screen in the FIGURE is for illustrative purposes only and forms no part of the claimed design. The broken line showing of the outline around the odometer and other displays, and broken line showing of the meter on the far right are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an engine monitor image for a portion of a display screen, as shown and described. 